Todd started drinking caffeinated coffee every night to stay awake to study for finals. On Sunday evening, Todd was able to stay awake after drinking one cup of coffee. By Thursday evening, Todd found that he needed to drink two cups of coffee to get the same effect. Why is this so?

Question

Quizplus · Accepted Answer

Todd has developed a tolerance to low doses of caffeine, which means his body has become accustomed to the effects of caffeine and requires a higher dose to produce the same desired effect. This is a common phenomenon among regular caffeine users. There is no evidence to suggest that Todd used caffeine in combination with a second drug on Sunday evening, or that one of the cups on Thursday was a placebo. As for whether or not Todd has become dependent on caffeine, that cannot be determined from the information provided.

Todd Started Drinking Caffeinated Coffee Every Night to Stay Awake